a) What is thermite reaction ? b) Q is an element which is one in copper, zinc, aluminium and iron, its properties are as follows. i) Q_(2)O_(3) is found in nature but not affected by water. ii) Two chlorides with formula QCI_(2) and QCI_(3) are formed by the metal. Identify the metal

a) What is thermite reaction ? b) Q is an element which is one in copp

1.	a) What is thermite reaction ? b) Q is an element which is one in copper, zinc, aluminium and iron, its properties are as follows. i) Q_(2)O_(3) is found in nature but not affected by water. ii) Two chlorides with formula QCI_(2) and QCI_(3) are formed by the metal. Identify the metal
Answer» Solution : a) The displacement reaction which is highly exothermic and the metal produced is in molten state is CALLED thermite reaction. i). Since the oxide of the metal is `Q_(2)Q_(3)` its valence is 3. therefore out of the mentioned metal only adumimium and iron can be the metal with PROPERTIES mentioned above. ii) `QCI_(2)` and `QCI_(3)` must be iron as it shows varible VALENCY of two and three. `FeCl_(2)` and `FeCl_(3)` are the chlorides.